57216406 has 16 divisors (see below), whose sum is σ = 93106944. Its totient is φ = 26213184.

The previous prime is 57216403. The next prime is 57216413. The reversal of 57216406 is 60461275.

It is a happy number.

57216406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57216403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4470 + ... + 11593.

It is an arithmetic number, because the mean of its divisors is an integer number (5819184).

Almost surely, 2^57216406 is an apocalyptic number.

57216406 is a deficient number, since it is larger than the sum of its proper divisors (35890538).

57216406 is a wasteful number, since it uses less digits than its factorization.

57216406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16215.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 57216406 is about 7564.1526954445. The cubic root of 57216406 is about 385.3365382558.

The spelling of 57216406 in words is "fifty-seven million, two hundred sixteen thousand, four hundred six".